public ResourceBase CreateResource(Type t, string resourceName, byte[] initData = null, bool canStore = false)
{
if (!resCreatorMaps.ContainsKey(t))
{
Log.WriteError("Cannot find creator resource of type " + t.Name + ", no creator delegate exists.");
return(null);
}
if (headers.ContainsKey(resourceName))
{
Log.WriteError("Cannot create resource, name is already in use: " + resourceName);
return(null);
}
ResourceHeader createdHeader = new ResourceHeader(resourceName, string.Empty, 0, 0, false, canStore, t.Name, new Dictionary <string, string>());
headers.Add(createdHeader.resourceName, createdHeader);
ResourceBase resource = resCreatorMaps[t].Invoke(this);
if (initData == null)
{
initData = new byte[0];
}
resource.Load(initData);
resources.Add(resource.rid, resource);
createdHeader.loaded = true;
createdHeader.loadedId = resource.rid;
return(resource);
}
public T Get <T>() where T : ResourceBase
{
ResourceBase rbase = Get();
if (rbase is T)
{
return((T)rbase);
}
Log.WriteError("Could not convert resource to type: " + typeof(T));
return(default(T));
}
public ResourceRef GetRef(string resourceName)
{
ResourceBase resource = GetResource(resourceName);
if (resource != null)
{
return(new ResourceRef(resource.rid, this));
}
else
{
return(null);
}
}
private void LoadResource(string resourceName)
{
if (!headers.ContainsKey(resourceName))
{
Log.WriteError("Cannot get resource with name=" + resourceName + ", does not exist.");
}
ResourceHeader header = headers[resourceName];
if (!File.Exists(header.filename))
{
Log.WriteError("Cannot get resource with name=" + resourceName + ", specified file does not exist.");
}
try
{
byte[] rawData;
using (FileStream fstream = File.OpenRead(header.filename))
using (BinaryReader reader = new BinaryReader(fstream))
{
if (header.fileStart > 0)
{
reader.BaseStream.Seek((long)header.fileStart, SeekOrigin.Begin);
}
int readLen = header.fileLength == 0 ? (int)reader.BaseStream.Length - (int)reader.BaseStream.Position : (int)header.fileLength;
rawData = reader.ReadBytes(readLen);
}
if (!resLoaderMaps.ContainsKey(header.loaderExt))
{
throw new Exception("Loader not found for extension: " + header.loaderExt + ". Unable to load resource: " + resourceName);
}
Type resourceType = resLoaderMaps[header.loaderExt];
ResourceBase resource = resCreatorMaps[resourceType].Invoke(this);
resource.Load(rawData);
resources.Add(resource.rid, resource);
ridToHeaderMap.Add(resource.rid, header.resourceName);
header.loaded = true;
header.loadedId = resource.rid;
Log.WriteLine("Loaded resource: " + resourceName);
}
catch (Exception e)
{
Log.WriteError("Error occured during resource load: " + e.ToString());
}
}
} //TODO: have this run on a background thread, and return a task-like object that can querry the loading status
public void UnloadResource(string resourceName, bool force = false)
{
if (!headers.ContainsKey(resourceName))
{
Log.WriteError("Cannot unload resource, no resource exists with name=" + resourceName);
return;
}
ResourceHeader header = headers[resourceName];
if (!header.loaded)
{
Log.WriteError("Cannot unload resource, it's currently not loaded. Name=" + resourceName);
return;
}
if (!header.canUnload)
{
if (!force)
{
Log.WriteError("Resource marked as never-unload, cannot unload. Name=" + resourceName);
return;
}
else
{
Log.WriteLine("Resource marked as never-unload, but force was specified. This may lead to cascading errors. Name=" + resourceName);
}
}
ResourceBase res = GetResource(header.loadedId);
resources.Remove(res.rid);
ridGenerator.FreeId(res.rid);
res.Unload();
res = null;
header.loadedId = 0;
header.loaded = false;
Log.WriteLine("Unloaded resource: " + header.resourceName);
}
